Principal components analysis (PCA) illustrating the variation in the plant species (∆) dataset at Palace Leas.

<p>Environmental variables including soil and plant variables (dotted arrow) and treatment plot number (●) are overlain. <i>A</i>. <i>capi = Agrostis capillaris</i>, <i>A</i>. <i>prat = Alopecurus pratensis</i>, <i>A</i>. <i>odor = Anthoxanthum odoratum</i>, <i>A</i>. <i>sylv = Anthriscus sylvestris</i>, <i>B</i>. <i>pere = Bellis perennis</i>, <i>B</i>. <i>hord = Bromus hordeaceus</i>, <i>C</i>. <i>maju = Conopodium majus</i>, <i>C</i>. <i>cris = Cynosurus cristatus</i>, <i>F</i>. <i>rubr = Festuca rubra</i>, <i>F</i>. <i>vern = Ficaria verna</i>, <i>H</i>. <i>lana = Holcus lanatus</i>, <i>L</i>. <i>camp = Luzula campestris</i>, <i>P</i>. <i>triv = Poa trivialis</i>, <i>R</i>. <i>acri = Ranunculus acris</i>, <i>R</i>.<i>bulb = Ranunculus bulbosus</i>, <i>R</i>. <i>mino = Rhinanthus minor</i>, <i>S</i>. <i>medi = Stellaria media</i>, <i>T</i>. <i>offi = Taraxacum officinale</i>, <i>T</i>. <i>prat = Trifolium pratense</i>, <i>T</i>. <i>repe = Trifolium repens</i>, <i>T</i>. <i>flav = Trisetum flavescens</i>, <i>V</i>. <i>sati = Vicia sativa</i>, <i>V</i>. <i>sepi = Vicia sepium</i>.